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29 #include "AnalyserNode.h"
31 #include "AudioNodeInput.h"
32 #include "AudioNodeOutput.h"
33 #include "ExceptionCode.h"
37 AnalyserNode::AnalyserNode(AudioContext* context, float sampleRate)
38 : AudioBasicInspectorNode(context, sampleRate, 2)
40 setNodeType(NodeTypeAnalyser);
45 AnalyserNode::~AnalyserNode()
50 void AnalyserNode::process(size_t framesToProcess)
52 AudioBus* outputBus = output(0)->bus();
54 if (!isInitialized() || !input(0)->isConnected()) {
59 AudioBus* inputBus = input(0)->bus();
61 // Give the analyser the audio which is passing through this AudioNode.
62 m_analyser.writeInput(inputBus, framesToProcess);
64 // For in-place processing, our override of pullInputs() will just pass the audio data through unchanged if the channel count matches from input to output
65 // (resulting in inputBus == outputBus). Otherwise, do an up-mix to stereo.
66 if (inputBus != outputBus)
67 outputBus->copyFrom(*inputBus);
70 void AnalyserNode::reset()
75 void AnalyserNode::setFftSize(unsigned size, ExceptionCode& ec)
77 if (!m_analyser.setFftSize(size))
81 void AnalyserNode::setMinDecibels(double k, ExceptionCode& ec)
83 if (k > maxDecibels()) {
88 m_analyser.setMinDecibels(k);
91 void AnalyserNode::setMaxDecibels(double k, ExceptionCode& ec)
93 if (k < minDecibels()) {
98 m_analyser.setMaxDecibels(k);
101 void AnalyserNode::setSmoothingTimeConstant(double k, ExceptionCode& ec)
103 if (k < 0 || k > 1) {
108 m_analyser.setSmoothingTimeConstant(k);
111 } // namespace WebCore
113 #endif // ENABLE(WEB_AUDIO)